A method and apparatus for performing a surgical repair may involve fixation of a repair material, such as a ligament or tendon in knee ligament repair procedure, to an internal cortical contact area in a bone. The cortical bone contact area may be located immediately adjacent an opening in the bone's surface through which the repair material extends. The repair material may be engaged with the contact area by way of a fixation device, such as a device that is attached to the repair material and functions as a stop member. An illustrative fixation device may include an annular portion with an aperture through with the repair material passes. The repair material may be attached to a securing portion that extends from the annular portion.
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1. A surgical repair method comprising:
forming a passageway through a bone with respect to which a joint repair material is to be fixated, wherein the joint repair material is configured to replace a ligament, the passageway extending from a first opening to a second opening, wherein the second opening has a size that is smaller than the first opening;
forming a contact area inside the bone, the contact area being formed, at least in part, by cortical bone located inside the bone's outer surface near the second opening, wherein the contact area of cortical bone is arranged in a plane generally transverse to a longitudinal axis of the passageway;
securing a first side of the joint repair material to a fixation device;
placing the first side of joint repair material and attached fixation device into the passageway through the first opening; and
positioning the fixation device within the bone by pulling the joint repair material through the second opening so that the fixation device is seated against the contact area and the joint repair material extends out of the second opening.
12. A surgical repair method comprising:
forming a passageway through a first bone, the passageway extending from a first opening to a second opening, the first opening having a first size at an outer surface of the first bone and the second opening having a second size at an outer surface of the first bone, the second size being smaller than the first size;
forming a contact area inside the first bone, the contact area being formed, at least in part, by cortical bone located near the second opening inside the first bone's outer surface, wherein the contact area of cortical bone is arranged in a plane generally transverse to a longitudinal axis of the passageway;
providing a first end of a joint repair material that is attached to a fixation device, wherein the joint repair material is configured to replace a ligament;
placing the first end of the joint repair material and attached fixation device into the passageway through the first opening;
pulling the joint repair material through the second opening to seat the fixation device against the contact area;
positioning the joint repair material to extend from within the first bone at the contact area and out through the second opening; and
securing a second end of the joint repair material opposite the first end to a body member distinct from the first bone.
2. The method of
positioning the fixation device within the bone so that the fixation device resists tension placed on the joint repair material to pull the joint repair material from the passageway and out of the second opening.
3. The method of
forming a hole through the bone, the hole having a size approximately equal to the size of the second opening; and
forming a counterbore in the hole to form the first opening and the contact area.
4. The method of
displacing cancellous bone in the passageway to expose an area of cortical bone in the passageway.
5. The method of
6. The method of
7. The method of
8. The method of
fixing a second side of the joint repair material with respect to a femur.
9. The method of
10. The method of
11. The method of
13. The method of
16. The method of
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1. Field of Invention
This invention relates to methods and apparatus for surgical repair.
2. Discussion of Related Art
Fixation devices are often used for surgical repair, such as when attempting to secure one body portion relative to another or relative to a surgical implant or other device. For example, tendon or ligament damage frequently requires surgery for repair, e.g., to reattach a torn or separated tendon or ligament to the bone to which the tendon/ligament would normally be attached. Knee ligament injuries typically involve damage to one or more ligaments such that a ligament, or at least a portion thereof, requires reattachment to the tibia and/or femur.
In one aspect of the invention, a ligament repair technique is provided that does not necessarily require the use of an interference screw to secure the ligament to a bone. In one embodiment, a portion of the bone itself may support the ligament without the need for an interference screw or other fixation device. In another embodiment, a fixation device, if provided, may be positioned in contact with an interior bone surface, e.g., a cortical bone surface, to secure the ligament in place
In one aspect of the invention, a surgical repair method includes forming an opening in a first bone, with the opening having a first size at an outer surface of the first bone. For example, the first bone may be a tibia, and the opening may be formed in a portion of the tibia near where a knee ligament, such as an ACL, is normally attached. A contact area is then formed inside the first bone, with the contact area being formed, at least in part, by cortical bone located near the opening inside the first bone's outer surface and having a size that is larger than the first size. For example, the contact area may be formed by an annular surface of the cortical bone inside the tibia and surrounding the opening. A first end of a joint repair material may be secured to the contact area in the opening, and the joint repair material may be positioned to extend from within the first bone at the contact area out through the opening. For example, a graft ligament may be secured to the contact area and extend out of the opening toward the femur. A second end of the joint repair material opposite the first end may be secured to a body member distinct from the first bone, e.g., the graft ligament may be secured to a femur, thereby connecting the tibia and femur. Although in this example the joint repair material is a graft ligament, the joint repair material may be any suitable naturally-occurring material (such as an autograft or allograft material), a synthetic material, or any suitable combination of natural and synthetic materials.
In another aspect of the invention, a surgical repair method includes forming a passageway through a bone with respect to which a joint repair material is to be fixated such that the passageway extends from a first opening to a second opening. A contact area may be formed inside the bone, so that the contact area is defined, at least in part, by cortical bone located inside the bone's outer surface near the second opening. A first side of the joint repair material may be secured to a fixation device, and the fixation device may be positioned within the bone so that the fixation device is seated at the contact area and the joint repair material extends out of the second opening. In one illustrative embodiment, the passageway may be formed through a tibia so that the second opening and contact area are located near the knee joint. The joint repair material, e.g., a graft ligament, may be secured to a fixation device and fed into the passageway such that the fixation device engages the contact area (securing the graft relative to the tibia) and the graft extends from the second opening. The graft may be secured to a femur using any suitable technique to complete the ligament repair. Thus, the fixation device may engage the contact area so that the fixation device resists tension placed on the joint repair material to pull the joint repair material from the passageway and out of the second opening.
The passageway may be formed so that the second opening has a smaller size than the first opening. In one embodiment, the passageway may be formed by forming a hole through the bone, with the hole having a size approximately equal to the size of the second opening. A counterbore may be formed in the hole to form the first opening and the contact area. Cancellous bone in the passageway may be displaced (e.g., compacted, removed, etc.) to expose an area of cortical bone in the passageway.
In another aspect of the invention, a surgical fixation device includes a base portion with an aperture constructed and arranged to receive a joint repair material, such as a graft ligament. The base portion has a contact surface and is constructed and arranged to contact a bone at the contact surface and secure the joint repair material relative to the bone. The fixation device also may include a securing portion constructed and arranged to secure the joint repair material relative to the base portion. The securing portion is arranged to engage with the base portion on a side of the base portion opposite the contact surface. The base portion and the securing portion may be arranged to be deployed entirely within a bone opening, e.g., such that no portion of the fixation device is located outside of the bone, and to resist tension applied on the joint repair material secured to the securing portion in a direction from the securing portion toward the contact surface. In addition, the securing portion may be arranged to position the joint repair material in contact with bone in the bone opening, e.g., to encourage attachment of the graft to the bone by healing processes.
In another aspect of the invention, a surgical fixation device includes an annular portion having a bone contact surface on a first side and an opening adapted to receive a ligament repair material. A securing portion may be arranged to engage with a second side of the annular portion opposite the first side. The securing portion may have an elongated member extending in a direction away from the contact surface when engaged with the annular portion, and may be adapted to secure a ligament repair material passing through the opening to the annular portion. The annular portion and the securing portion may be arranged to be deployed entirely within a bone opening and to resist tension applied on the ligament repair material secured to the securing portion in a direction from the securing portion toward the contact surface.
In one embodiment, at least a portion of the securing portion extends across the opening in the annular portion. Also, the elongated member of the securing portion may include opposed grooves to receive the joint repair material, and may have one or more openings adapted to receive suture to secure the ligament repair material to the securing portion. The elongated member of the securing portion may have a Y-shape with two legs attached to the annular portion (e.g., on opposite sides of the opening) and one leg extending away from the annular portion. The securing portion may also taper so as to be thinner in a region near the opening in the flange and so as to be thicker in a region positioned away from the opening. The base and securing portions may be made of a non-absorbable, biocompatible material, such as titanium, and/or an absorbable material, such as polylactic acid (PLA), and/or other materials or combinations of materials.
Other aspects of the invention are provided that are not necessarily restricted to use in knee ligament repair. Instead, aspects of the invention may be used in other surgical repair techniques in which a ligament, tendon, prosthetic or other material is secured relative to bone.
Various aspects of the invention are described with reference to illustrative embodiments, wherein like numerals reference like elements, and wherein:
This invention is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the drawings. The invention is capable of other embodiments and of being practiced or of being carried out in various ways. Also, the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting.
Various aspects of the invention are described below with reference to specific embodiments. For example, aspects of the invention are described in the context of performing a knee ligament repair. However, it should be understood that aspects of the invention are not necessarily restricted to knee ligament repair techniques, or even to surgical techniques performed on a knee. Rather, various aspects of the invention may be used in any suitable surgical procedure. In addition, various aspects of the invention may be used alone, and/or in combination with any other aspects of the invention.
In this illustrative embodiment, a ligament 2, such as an anterior cruciate ligament (ACL) 2 has been damaged and is replaced by a repair material 4. The repair material 4 may be an allograft or autograft of knee ligament material, such as ligament material harvested from a patient's patella or a harvested hamstring tendon, etc. The repair material 4 may optionally be a man-made material, such as a mesh or other prosthetic device. In short, the repair material 4 may be any suitable material or combination of materials for the repair.
In accordance with one aspect of the invention, one end of the repair material 4 is secured relative to a bone via contact with an internal area of cortical bone. Thus, the repair material 4 may be robustly fixed in place without necessarily requiring an interference screw, an expanding anchor, or other similar device. In this illustrative embodiment, the repair material 4 engages with an internal contact area 5 of the tibia 12, but it should be understood that a similar engagement may be made with a contact area 5 in the femur 11. By engaging the repair material 4 with a cortical bone contact area 5, the repair material 4 can be solidly anchored relative to the bone with a minimal risk of movement of the contact area 5, e.g., in the direction of tension tending to pull the repair material 4 out of the tibia 12 and toward the femur 11. This is not necessarily the case with anchoring arrangements that engage the repair material 4 with cancellous bone, which may compress or otherwise give way when the repair material 4 is placed under tension or other stress.
The contact area 5 may be formed in the bone in any suitable way. For example, in the embodiment shown in
The repair material 4 may be secured to the contact area 5 in any suitable way, such as by one or more fixation devices that are formed separately from and attached to the repair material, and/or by a component that is integrally formed with the repair material. For example, the repair material 4 may be secured to a bushing-like member or other device that has at least one portion that is larger than the size of the second opening 62. As a result, if the repair material 4 is fed through the passageway 6 from the first opening 61 and pulled through the second opening 62, the bushing-like member may engage with the contact area 5, preventing the repair material 4 from being further pulled from the second opening 62.
In another illustrative embodiment, the repair material may have an integrally formed member that engages with the contact area 5. For example, as shown in
In another illustrative embodiment, the opening formed in the bone for securing a repair material need not be formed as a passageway that extends from one opening through the bone to another opening. Instead, as shown in
A securing portion 74 may have an elongated shape and extend from the base portion 71 in a direction away from the contact surface 72. One or more holes 75 or other features may be provided in the securing portion 74, e.g., to receive suture for securing a repair material 4 to the securing portion 74. As can be seen in the bottom view of
Although in this embodiment, the fixation device 7 is shown as formed as a unitary piece, e.g., molded of a suitable material, the fixation device 7 may be made in two or more separate parts. For example, the base portion 71 and the securing portion 74 may be made separately and assembled on a repair material. The securing portion 74 may then engage the base portion 71 by way of interference to resist pulling of the repair material 4 and the securing portion 74 through the aperture 73. For example, in an application like that shown in
In other illustrative embodiments, the securing portion 74 may include two or more portions to help secure the repair material 4, to help engage the repair material with bone in the opening, and/or to perform other functions. For example, the securing portion 74 may include a sleeve that is located over the repair material 4 after the material 4 is engaged with the securing portion 74 as shown in
In the embodiments above, the repair material 4 is first secured at the contact area 5, e.g., of the tibia 12, and then an opposite, second end of the repair material 4 is secured to another bone, e.g., the femur 11. However, it should be understood that aspects of the invention are not so limited. Instead, the repair material 4 may be first secured (e.g., to a tibia 12) using the techniques described above or any other suitable method, and then secured to a cortical contact area 5 (e.g., in a femur 11). Although securing of the repair material to the contact area 5 may be performed using the devices described above,
It should be understood that aspects of the invention include repair techniques in which a repair material is secured to a cortical contact area 5 of a bone at one or more ends of the repair material. Moreover, if one portion of a repair material 4 is secured to a cortical contact area 5, other portions of the repair material 4 may be secured to the same or different bone using any suitable technique or device, as are known in the art, such as interference screws, etc. In addition, fixating a repair material via a cortical contact area 5 may be supplemented by additional securing techniques, such as conventional interference screw fixation.
Although various embodiments have been described above in the context of a knee ligament repair, aspects of the invention may be used in other applications, such as rotator cuff repair or other tendon repair, hernia mesh fixation, and others.
Having thus described several aspects of at least one embodiment of this invention, it is to be appreciated various alterations, modifications, and improvements will readily occur to those skilled in the art. Such alterations, modifications, and improvements are intended to be part of this disclosure, and are intended to be within the spirit and scope of the invention. Accordingly, the foregoing description and drawings are by way of example only.
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